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Ring-opening metathesis polymerization of p-dicyclopentadiene (DCPD) can be performed using the tungsten type catalyst. This reaction usually progresses in nitrogen condition, because the catalysts are extremely sensitive in air condition. To solve this problem, DCPD resin with tungsten (W) was cured using hot press after stirring of DCPD A and B liquid in air condition. Mechanical properties of DCPD were improved by reducing microvoid occurrence successfully by using hot press method. It might be because hot press could provide sufficient press on DCPD specimen. Addition of catalyst was not effective for the curing of resin in a short time. During polymerization, pressure and temperature had a great influence on the mechanical properties of DCPD.  :  (p-DCPD)     .             . ,              .           (W)  p-DCPD      .     p-DCPD (W)        ,  DCPD            .         ,             .  p-DCPD      ,  ,        .

An Improved Manufacturing Method of p-Dicyclopentadiene (DCPD) using Tungsten Type Catalyst in Air Condition